@article{DE_1983_19_1_a20,
     author = {A. Yanushauskas},
     title = {A type of degeneration of elliptic systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {152--160},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_1_a20/}
}